During April 2025, htl10 contributed to the numpy/numpy repository by enabling Windows 11 ARM64 wheel support and refining ARM64 test processes. They implemented cross-platform build configuration using Python and YAML, focusing on Meson-based build adjustments to generate distributable wheels for ARM64 environments. Their work improved test reliability and messaging hygiene, making ARM64 continuous integration results clearer and more actionable. By addressing test cleanliness and environment handling, htl10 expanded numpy’s installability across architectures and enhanced the maintainability of ARM64 testing workflows. The depth of their contribution lay in targeted build automation and CI/CD improvements, supporting broader adoption of numpy.